Bank card issuing associations charge a percentage of the sale for the use of their cards and this amount is referred to as a transaction fee. The percentage paid by the merchant may vary depending on the monthly sales volume, the average sale size and whether a transaction is processed with or without the card being physically present.

A gateway fee is applied by the transaction processor to cover the costs of receiving and processing the transaction. While a transaction fee is a contribution for the convenience of accepting credit card payments, a gateway fee pays for the use of the infrastructure to receive payment information, request authorisation from the customers bank, transmit the authorisation information to the merchant and to facilitate payment of the merchant.

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